4-2
ELECTRICAL TROUBLESHOOTING GUIDE
Reset or power check.
OK
Check the power (5V/12V) signal
path from SMPS.
Repair the SMPS Block
NO
Are the Pin1 of
5V, Pin4 of 12V
respectively after the power
cable connecting?
Check the LIC901 and
LIC901 input voltage 5V (Pin#3)
NO
<Power>
Is the Pin2 of LIC901
3.3V?
Check it after connecting the power cable only on
interface cable for
NO Reset or Power ON
.
YES
YES
YES
Check the LIC902 and
LIC902 input voltage 3.3V (Pin#3)
NO
<Power>
Is the pin2 of LIC903
1.2V?
YES
YES
Check the LX501(25MHz),
Check the LIC501
NO
Are the LX501 oscillating?
YES
YES
Check the AVCC 5volt and
Reset Circuit.
(LR5B0,LR5B1,LC5B0)
NO
Does the Pin120
(Reset in) of LIC501 change
0V to 1.63V at the power supply
initial input mode?
Check the LIC501
NO
<Reference>
1.65V (V14ref) :
Check Pin1 of LIC501
2.2V (VFVREF) : Check Pin2 of
LIC501 2.2V (VHAVC) :
Check Pin3 of
LIC501
1. RESET OR POWER CHECK
Summary of Contents for HB954TB
Page 51: ...2 42 WAVEFORMS 1 SYSTEM PART 1 X500 27MHz 1 X501 25MHz 2 1 IC500 BCM7440P 2 ...
Page 53: ...2 44 3 VIDEO PART 1 100 FULL COLOR BAR CVBS_I 7 Y 8 Pb 9 Pr 10 7 9 10 8 ...
Page 54: ...2 45 4 VIDEO PART 2 100 FULL COLOR BAR CVBS 11 COMP_Y 12 COMP_Pb 13 COMP_Pr 14 11 14 12 13 ...
Page 55: ...2 46 5 HDMI PART HDMI_SDA 15 HDMI_SCL 16 HDMI_CLK 17 HDMI_DATA 18 18 17 15 16 ...
Page 56: ...2 47 6 MICOM AND MPEG I F PART T_TX 19 R_RX 20 20 19 ...
Page 57: ...2 48 MEMO ...
Page 80: ...2 93 2 94 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Page 81: ...2 95 2 96 MAIN P C BOARD BOTTOM VIEW ...
Page 82: ...2 97 2 98 2 SMPS P C BOARD TOP VIEW ...
Page 83: ...2 99 2 100 SMPS P C BOARD BOTTOM VIEW ...
Page 84: ...2 101 2 102 3 AMP P C BOARD TOP VIEW BOTTOM VIEW ...
Page 87: ...3 2 MEMO ...
Page 93: ...3 10 ...
Page 94: ...954B 954A 950 955 956 957 951 958 953 952 A900 4 3 PASSIVE SUBWOOFER SB94TB W 3 11 ...
Page 95: ...MEMO 3 12 ...
Page 117: ...4 22 MEMO ...
Page 118: ...4 24 4 23 CIRCUIT DIAGRAM LOADER HL 04P EBY51750301 REV 6 1 2009 01 20 ...
Page 120: ...4 27 4 28 PRINTED CIRCUIT BOARD DIAGRAMS TOP VIEW ...
Page 121: ...4 29 4 30 BOTTOM VIEW ...